Removal of glycols from a polyalkylene glycol dialkyl ether solution
US4962238A · kind A · utility
49Cited by
2References
26Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Oct 4, 1989 |
| Grant date | Oct 9, 1990 |
| Priority date | — |
| Expiry date | Oct 4, 2009 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07C41/38
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
The removal of a glycol contaminant from a mixture of polyalkylene glycol dialkyl ethers is achieved using a dual solvent extraction process. The process is particularly applicable to removing glycols which accumulate in recirculating solutions of polyalkylene glycol dialkyl ethers used for the absorption of acid gases from feedstocks such as natural gas, synthetic natural gas, refinery gas, and ammonia synthesis gas.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.